The registration address of the company is located on the 5th floor of building 2 of tianhuang street, beijing city; the registration authority is the market supervisory authority of the beijing city, with representatives of legal entities, and covers general items: technical services, technology development, technical advice, technology exchange, technology transfer, technology promotion; sale of mechanical equipment; manufacture of general-purpose equipment (excluding special equipment); repair of specialized equipment; manufacture of mechanical and electrical equipment; manufacture of specialized equipment (excluding licensed specialized equipment); manufacture of specialized equipment for environmental protection; manufacture of specialized machinery for water resources; sale of electrical equipment; production of electrical equipment for domestic appliances; sale of instrumentation; sale of plastics; manufacture of glass products on a daily basis; sale of refrigeration, air-conditioning equipment; management of water pollution; sale of equipment for water environment pollution prevention and control; sale of specialized equipment for cleaning, cleaning and decontamination; sale of equipment for the sale of specialized equipment for marine engineering; sale of electrical and mechanical equipment for the maintenance of the computer-based and computer-based technology-based equipment. (a project subject to approval by law may only be carried out with the approval of the relevant department, depending on the documents or licences approved by the relevant department) (no activity shall be carried out in the category of projects prohibited and restricted by the state and municipal industrial policy